use std::io::Write;

use color_eyre::eyre::{ContextCompat, Result};
use console::{Key, Term, style};
use fuzzy_matcher::skim::SkimMatcherV2;
use itertools::Itertools;

pub fn input_text(term: &mut Term, default: &str, name: &str) -> Result<String> {
    let mut text = default.to_string();

    term.show_cursor()?;
    write!(term, "{}: {}", name, text)?;

    loop {
        term.clear_line()?;
        write!(term, "{}: {}", name, text)?;

        let key = match term.read_key() {
            Ok(key) => key,
            Err(err) => {
                term.show_cursor()?;
                return Err(err.into());
            }
        };

        match key {
            Key::Enter => {
                writeln!(term)?;
                term.hide_cursor()?;
                return Ok(text);
            }
            Key::Backspace => {
                text.pop();
            }
            Key::Char(char) => {
                text += &char.to_string();
            }
            _ => {}
        }
    }
}

pub fn input_selection<T: Clone>(term: &mut Term, data: Vec<(String, T)>, name: &str) -> Result<T> {
    let mut filter = "".to_string();

    write!(term, "{}:", name)?;

    loop {
        let matcher = SkimMatcherV2::default();
        let matches = data
            .iter()
            .filter_map(|(text, data)| {
                matcher
                    .fuzzy(text, &filter, true)
                    .map(|some| (data, text, some))
            })
            .sorted_by(|(_, _, fuzzy_a), (_, _, fuzzy_b)| fuzzy_a.0.cmp(&fuzzy_b.0).reverse())
            .enumerate()
            .map(|(index, (path, path_str, fuzzy))| {
                (
                    highlight_search(path_str, &fuzzy.1, index != 0),
                    path,
                    path_str,
                )
            })
            .collect_vec();

        term.clear_line()?;

        if matches.is_empty() {
            write!(term, "{}: {}", name, filter)?;
        } else {
            write!(
                term,
                "{}: {}",
                name,
                matches.iter().map(|(path, _, _)| path).join(" ")
            )?;
        }

        let key = match term.read_key() {
            Ok(key) => key,
            Err(err) => {
                term.show_cursor()?;
                return Err(err.into());
            }
        };
        match key {
            Key::Enter => {
                let (_, data, text) = matches.first().context(format!("no {} Selected", name))?;

                term.clear_line()?;
                writeln!(term, "{}: {}", name, text)?;
                break Ok((*data).clone());
            }
            Key::Backspace => {
                filter.pop();
            }
            Key::Char(char) => {
                filter += &char.to_string();
            }
            _ => {}
        }
    }
}

fn highlight_search(text: &str, highlighted_letters: &[usize], is_dark: bool) -> String {
    text.chars()
        .enumerate()
        .map(|(index, c)| {
            match (is_dark, highlighted_letters.contains(&index)) {
                (false, true) => style(c).red().to_string(),
                (false, false) => c.to_string(),
                //dark red
                (true, true) => style(c).color256(8).bold().to_string(),
                //light gray
                (true, false) => style(c).color256(8).to_string(),
            }
        })
        .collect()
}